"The service, he says, will be "privacy sensitive," with no logging of the addresses making DNS requests—"we will keep only [rough] geolocation data," he said, for the purposes of tracking the spread of requests associated with particular malicious domains. "We're anonymizing the data, sacrificing on the side of privacy."

Will Quad9 filter content?

No. Quad9 will not provide a censoring component and will limit its actions solely to the blocking of malicious domains around phishing, malware, and exploit kit domains."

How will Quad9 prevent the accidental blocking of legitimate domains?

Quad9 implements whitelisting algorithms to make sure legitimate domains are not blocked by accident. However, in the rare case of blocking a legitimate domain, Quad9 works with the users to quickly whitelist that domain."

Lets start.
USA lost DNS "Highness" and provide a free DNS service for public.

sponsors are london & new york police, IBM (which isnt good too) and others

Yeah, DNS providers can log but on Quad9 front page they say "Quad9 is a free, recursive, anycast DNS platform that provides end users robust security protections, high-performance, and privacy."
But look at https://quad9.net/#/policy:What Information Do We Collect?
Temporary Logs
# The temporary logs store the full IP address of the machine you are using